<html>
    <head>
    <title>百度一下</title>
    <meta name="description" content="全球领先的中文搜索引擎"> 
    <meta name="keywords" content="bilibili,哔哩哔哩,">
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            <li><a href="#">视频</a></li>
            <li><a href="#">贴吧</a></li>
            <li><a href="#">学术</a></li>
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            <li><a href="#">设置</a></li>
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